Answer
Hi,
They are spread primarily by human activities.
Three methods that can spread invasive species is ; blowing by wind, splashed by rain and carried by animals.
Explanation
Invasive species are a kind of living organisms that are new to an ecosystem and can result into harm that is diverse .These species grow and reproduce at a quicker rate and spread rapidly with potential of causing more harm. In short distances, these organisms depend on natural dispersal ways to spread to other places. Example of an invasive species is Burmese pythons in the Everglades.
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